37 gb – TechniSat GigaSystem 17/8 K Benutzerhandbuch
Seite 37
6.2 Apartment buildings with 40 participants on 5 floors
37
GB
4.floor
3.floor
2.floor
1.floor
ground floor
TEC 860
16
16
17ZR
17/8K
17/8K
17/8K
17/8K
VHF
UKW
UHF
17/8G
Calculation of range of coverage:
- cascade with distribution by floors
- example for sub distribution in longer installations
(in this case you need to use 17/2A instead of the LNB’s)
1)
2
Isolation of the 17/8K, for calculation purposes without consideration
of the LNB’s
)
Together with the 25dB of the LNB’s at best there will be arising
approx. 24dB isolation. If you add two 17/2AR and one
17ZR in a longer installation (see 6.2),
the
will decrease to
worst case)
=> That’s just enough to operate.
isolation 20dB
(
16
16
30 feet
Multimedia cable
5m
Multimediacable
75 feet
CoaxSat
cable
17
level
isolation
voltage
current
LNB
70
45
17,2
800
@2,15 GHz (dB)
(V) on the spot (mA)
17/8K-input
62
45
1)
17,3
930
socket
54
35
17/8K-input
56
42
17,4
1060
socket
48
35
17ZR
54
38
17,5
1370
17/8K
67
37
17,6
socket
59
33
17/8K-input
61
36
17,8
1500
socket
53
32
17/8K-input
55
35
18V
1570
socket
47
32
2)
MBV 4
1240
1370
GigaSystem_17_8_deu_engl_23112011_3.qxp 28.11.2011 09:34 Seite 37